The flies that show a preference for either Hawthorn or Apples, and are no longer interbreeding populations because of this, illustrate what type of speciation?
allopatric
specialization
polyploidy
founder effect
sympatric
The flies that show a preference for either Hawthorn or Apples, and are no longer interbreeding populations be
Sympatric is correct.
Allopatric = the speciation occurs in a different place (allo = different); this would happen if one portion of the original fly population had migrated and adapted to the different conditions of its new habitat
Specialization = not something I've heard of. This seems to be something to throw you off.
Polyploidy = the condition of having multiple sets of chromosomes. We're diploid. Plants can evolve into different species through polyploidy, but animals can not. That's because some plants are self-fertilizing.
Founder effect = the resulting smaller gene pool that's a result of just a few individuals moving to another place. This could happen if a pregnant female migrates. Such a small gene pool could lead to speciation.
Sympatric speciation occurs in the same place (sym = together). Since the flies live in the same place, but they are differentiated only by their food preference, speciation has occurred without migration.
Reply:Sympatric - the flies become dependent on different plants in the same area.
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